Container { max-width: 800px; margin: 20px auto; background-color: #ffffff; border: 1px solid #e0e0e0; border-radius: 8px; box-shadow: 0 4px 8px rgba(0,0,0,0.1); overflow: hidden; }. header { background-color: #004d99; color: #ffffff; padding: 20px; text-align: center; border-bottom: 4px solid #ffcc00; }.
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